/* 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.felix.framework.searchpolicy;

import java.util.EventListener;

import org.apache.felix.moduleloader.ModuleEvent;

/**
 * <p>
 * This is an event listener interface for listening to resolution
 * events that are generated by the <tt>R4SearchPolicy</tt>. Events
 * are fired when a module is resolved and when it is unresolved.
 * </p>
 * @see org.apache.felix.framework.searchpolicy.R4SearchPolicyCore
**/
public interface ResolveListener extends EventListener
{
    /**
     * This is an event callback method that indicates that
     * a module was resolved.
     * @param event the module event containing the event data.
    **/
    public void moduleResolved(ModuleEvent event);

    /**
     * This is an event callback method that indicates that
     * a module was unresolved.
     * @param event the module event containing the event data.
    **/
    public void moduleUnresolved(ModuleEvent event);
}